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v0.37.0

vercel-labs/agent-browserv0.37.0Sep 8, 2026by github-actions[bot]

AI Summary

This release introduces higher-quality video recording with customizable frame rates and improved session management. It also enhances WebMCP tool availability reporting and ensures new tabs inherit the active session's configuration.

Key Highlights

  • Added 30fps video recording with `Page.startScreencast` and support for WebM and MP4 formats.
  • Navigation responses now advertise when a page exposes allowed WebMCP tools.
  • New tabs automatically inherit session settings like headers, credentials, and geolocation.
  • Improved recording startup validation and error diagnostics for ffmpeg.

New Features

  • Higher-quality video recording with `--fps` support and wall-clock timing preservation.
  • WebMCP availability output for CLI, JSON, and MCP clients.
  • Session setup inheritance for new tabs before their first navigation.

Full Release Notes

### New Features

- Added **higher-quality video recording**: `record start` and `record restart` now capture the current active page at 30 fps by default, support `--fps 1-60`, use `Page.startScreencast` for smoother motion, and preserve wall-clock timing. WebM and MP4 output are documented, and `doctor` reports the ffmpeg recording dependencies (#1763, #1776, #1778)
- Added **WebMCP availability output** so navigation responses advertise when a page exposes allowed WebMCP tools, including availability metadata for CLI, JSON, and MCP clients (#1760)
- Added **session setup inheritance for new tabs**. Tabs opened with `tab new` or through page clicks now inherit the active session's headers, credentials, user agent, locale, timezone, geolocation, offline mode, routes, color scheme, and init scripts before their first navigation (#1777)

### Bug Fixes

- Fixed **recording startup validation** so missing ffmpeg, extensionless output paths, and invalid recording options fail before browser or recording state changes. Failed replacements preserve the active take, and ffmpeg errors now include useful diagnostics (#1778)
- Fixed **recording navigation state** so URL navigation during recording clears stale element refs, frame scope, and page WebMCP state like normal navigation (#1776)

### Contributors

- @jamesvclements
- @ctate
- @Railly